SPA-C Corten Steel High-Strength & Superior Atmospheric Corrosion Resistance
SPA-C is a premium atmospheric corrosion-resistant, high-strength low-alloy structural steel complying with the JIS G3125 standard. Engineered to form a dense, protective oxide layer (patina), SPA-C offers exceptional durability in harsh environments without the need for frequent painting or maintenance.
SPA-C Corten Steel are a class of alloy steels that develop the appearance of protective corrosion when exposed to the natural environment.SPA-C is a specific grade of weathering steel that conforms to Japanese Industrial Standard (JIS) G 3125.
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Product name |
SPA-C Corten Steel | |
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thickness : 0.6-14mm or customizable |
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width: 1000-2000mm or customizable |
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length : 3000-12000mm or customizable |
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Application |
railway vehicles, stamping parts, equipment manufacturing, air preheater, landscape decoration, petrochemical engineering, with corrosion resistance, green energy saving and environmental protection, | |
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Technique |
Cold-rolled, |
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Surface |
Mill Finished or as per required |
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Certification: |
BV, ISO, CE |
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Payment terms |
T/T , L/C |
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Upon the final quantity you demand |
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MTC will be handed on with shipping documents |
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We accept the third party certification test |
1. Technical Specifications (Core Data)
■ Chemical Composition: Optimized for Longevity
The secret to SPA-C's performance lies in its precise alloy balance, particularly the elevated Phosphorus (P) and Copper (Cu) content, which catalyzes the formation of a protective "barrier" against corrosion.
| Element | C | Si | Mn | P | S | Cu | Cr | Ni |
| Content (%) | ≤0.12 | 0.2-0.75 | ≤0.60 | 0.07-0.15 | ≤0.035 | 0.25-0.55 | 0.30-1.25 | ≤0.65 |
■ Mechanical Performance: Strength Meets Ductility
SPA-C is not just about corrosion resistance; it provides the structural integrity required for heavy-duty engineering.
| Property | Value |
| Yield Strength (ReH) | ≥ 325 MPa |
| Tensile Strength (Rm) | ≥ 450 MPa |
| Elongation (A50mm) | ≥ 26% |
2. Why Choose SPA-C? (Key Advantages)
🏆 Extreme Corrosion Resistance: Under atmospheric exposure, SPA-C forms a dense amorphous oxide film. This layer prevents corrosive media (oxygen and moisture) from penetrating the steel base, outperforming ordinary carbon steel by 5 to 10 times.
🛡️ Revolutionary Self-Healing Patina: If the surface oxide layer is damaged or scratched, the steel's alloying elements react with the atmosphere to spontaneously regenerate a new protective film, ensuring uninterrupted protection.
💰 Significant Maintenance Savings: By eliminating the need for periodic anti-rust coating and repainting, SPA-C drastically reduces the Total Cost of Ownership (TCO) over the project's lifecycle.
✨ Excellent Surface Finish: Available in Cold-Rolled (CR) state, providing superior dimensional precision and a smooth surface, ideal for high-end architectural details and precision engineering.
3. Versatile Applications
Thanks to its dual-focus on strength and weatherability, SPA-C is the material of choice for:
Architecture & Infrastructure: External walls, roofing systems, and steel frames designed to withstand rain, snow, and fog for decades.
Transportation & Logistics:
- Containers: Ideal for freight and refrigerated containers facing maritime salt-spray.
- Railway Vehicles: Structural components for freight and passenger cars requiring wear and corrosion resistance.
- Bridges & Towers: Piers, deck components, and transmission towers in exposed environments.
- Industrial Equipment: High-temperature and corrosive gas environments such as Air Preheaters, Economizers, and chimneys.
4. Delivery & Customization Services
We provide SPA-C steel tailored to your specific project requirements:
Delivery States:
- Cold-Rolled (CR): For high precision and surface quality.
- Hot-Rolled (HR): For heavy structural applications.
- Heat Treatment: Annealed, Quenched & Tempered (Q+T) options available.
Surface Treatment Options:
- Raw/Mill Finish (Natural weathering).
- Pre-Rusting Service (Achieve uniform orange-brown color instantly).
- Rust-Fixing/Sealing (Prevent rust-bleeding on surrounding surfaces).
- Oiling/Painting (Additional protection if required).
5. Quality Assurance
Each batch of SPA-C comes with a full Mill Test Certificate (MTC) verifying compliance with JIS G3125 standards. We ensure that every plate meets the rigorous demands of global infrastructure and industrial projects.
Company profile
GNEE Steel was founded in 2008 with a registered capital of 5 million yuan. After more than ten years of ups and downs, GNEE Steel has grown into a comprehensive steel supply chain enterprise. It has 8 subsidiaries, located in Anyang, Tianjin, Hong Kong, Zhengzhou, Singapore and other countries and regions in China, with more than 200 employees, and its influence has reached all over the world
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High Quality
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Advanced Equipment
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Professional Team
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Custom Service
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